Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40
The AirTAC SAIJ80X275-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 275 mm travel by up to 40 mm. This yields a precise usable travel window of 235-275 mm, ideal for fine-tuning end positions at commissioning without swapping hardware. It delivers a robust 2513 N push force at 0.5 MPa, scaling up to 4523 N at 0.9 MPa.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, and fluid connections use PT tapered ports sized at G3/8. The rear adjuster acts purely as a mechanical stop to set the retraction end, meaning it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 Is Used
Product Changeover
Dial in the 235-275 mm travel window during format size changes on a packaging line without replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retraction end-point during machine commissioning to perfectly align tooling, absorbing mechanical tolerances via the rear adjuster screw.
Variable End Stops
Provide adjustable physical stops for automated assembly equipment where the exact resting position of a 2513 N push force needs occasional calibration.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full 3927 N output of a 100 mm unit. The adjustable 235-275 mm window is selected over a fixed-stroke SAI when a machine requires variable end-stops or product-size changeovers, eliminating the need to bolt on external stoppers. Because the stroke is 275 mm, ensure adequate external guiding to prevent excessive side-loading on the 25 mm rod.
For an exact ISO 15552 replacement match, verify the 80 mm bore, 275 mm nominal stroke, 40 mm adjustment range, PT port thread, and required mounting style. SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that this SKU does not include a magnet (-S); adding one enables use with AirTAC CMSE reed and DMSE electronic solid-state sensors.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX275-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 275 mm by up to 40 mm, creating a usable stroke window of 235-275 mm. This adjuster functions as a travel stop and does not lock or hold the load without continuous air pressure.
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